Chemical formula : SiO2
Colour : Pure form of this mineral is colour less, if impurities present then it is coloured
Structure : Sub angular, rhombohedral
Hardness on (on Mohâ??s scale) : 7
Specific gravity : 2.65
Bulk density(tapped) gms/cc : 165.5
Melting point : 2912 fahrehneit
Boiling point : 4000 fahrehneit
Ph balance : 7
Matter solubility in H2O : Insoluble
Refractive index : 1.544
Mesh : 250 mesh ( 65 micron) â?? 800 mesh (10 micron)
Average particle size(micron) : 3-11.3
Relative density : 130-430
Oil absorbtion ml/ 100 gm : 40
Brightness : 90-98 %

USES OF QUARTZ SILICA POWDER
In semi conductor industry, Silica powder is used to conduct reaction with hydrofluoric acid for engraving quartz.
Reaction of silica with lead oxide or sodium oxide is utilized to produce different grades of glass that includes borosilicate glass.
It is used as one of the key ingredients for micro chip in computer.
It acts as an additive for processing of plastics and rubber.
It is used as a powerful filler for producing construction material like concrete.
It is used for improving viscosity of coatings.
Useful for enhancing holding capacity of tire on wet surface.